Air cooling unit to be mounted on the front of an electric fan



FIG. 1 is a perspective view of an air cooling unit to be mounted on the front of an electric fan showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line showing of a fan, water drops, a can, and a horizontal surface in FIG. 1, and of a portion of a fan in FIG. 3, is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an air cooling unit to be mounted on the front of an electric fan, as shown and described. 